caa a22 4500 463251733 CHVBK 20180405153342.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10562-007-9087-8 doi (NATIONALLICENCE)springer-10.1007/s10562-007-9087-8 The dynamic surface chemistry during the interaction of CO with ceria captured by Raman spectroscopy [Elektronische Daten] [Meghan Swanson, Vladimir Pushkarev, Vladimir Kovalchuk, Julie d'Itri] The interaction of CO with ceria under conditions typically used to measure the oxygen storage capacity (OSC) of automotive three way catalysts (TWC) has been investigated by in situ Raman spectroscopy. During exposure of the ceria to CO at 623K vibrational bands at 1582-1600 and 1331-1340cm−1 appeared; these bands increased with increasing time of exposure to CO. The band positions are consistent with phonon modes of carbon; however, assignment to carboxylate species or carbonate species cannot be excluded. Subsequent exposure to O2 at room temperature resulted in a decrease in the intensities of the 1582-1600 and 1331-1340cm−1 bands by more than 90%. As well, exposure to O2 at room temperature also resulted in the appearance of Raman modes characteristic of formate and peroxide surface species. The mechanism by which formate forms upon room temperature O2 exposure is discussed in the context of the assignment of the 1582-1600 and 1331-1340cm−1 bands to carbon phonon modes which result from the disproportionation of CO on reduced ceria. Springer Science+Business Media, LLC, 2007 CO adsorption nationallicence ceria nationallicence CO disproportionation nationallicence carbonates nationallicence carboxylates nationallicence oxygen storage capacity nationallicence in situ Raman spectroscopy nationallicence Swanson Meghan Department of Chemical and Petroleum Engineering, University of Pittsburgh, 15261, Pittsburgh, PA, USA aut Pushkarev Vladimir Department of Chemical and Petroleum Engineering, University of Pittsburgh, 15261, Pittsburgh, PA, USA aut Kovalchuk Vladimir Department of Chemical and Petroleum Engineering, University of Pittsburgh, 15261, Pittsburgh, PA, USA aut d'Itri Julie Department of Chemical and Petroleum Engineering, University of Pittsburgh, 15261, Pittsburgh, PA, USA aut Catalysis Letters Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 116/1-2(2007-07-01), 41-45 1011-372X 116:1-2<41 2007 116 10562 https://doi.org/10.1007/s10562-007-9087-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9087-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Swanson Meghan Department of Chemical and Petroleum Engineering, University of Pittsburgh, 15261, Pittsburgh, PA, USA aut NATIONALLICENCE 700 1- Pushkarev Vladimir Department of Chemical and Petroleum Engineering, University of Pittsburgh, 15261, Pittsburgh, PA, USA aut NATIONALLICENCE 700 1- Kovalchuk Vladimir Department of Chemical and Petroleum Engineering, University of Pittsburgh, 15261, Pittsburgh, PA, USA aut NATIONALLICENCE 700 1- d'Itri Julie Department of Chemical and Petroleum Engineering, University of Pittsburgh, 15261, Pittsburgh, PA, USA aut NATIONALLICENCE 773 0- Catalysis Letters Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 116/1-2(2007-07-01), 41-45 1011-372X 116:1-2<41 2007 116 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer